Abstract: The invention relates to a silicon-based anode material for a lithium-ion battery, a preparation method therefor, and a battery. The silicon-based negative electrode material is prepared by the compounding of 90 wt %-99.9 wt % of a silicon-based material and 0.1 wt %-10 wt % of carbon nanotubes and/or carbon nanofibers which grow on the surface of the silicon-based material in situ.

Abstract: A method includes obtaining a key status for a first cryptographic key. The first cryptographic key is used to encrypt replicated data of a first replication instance. The method also includes determining, based on the key status, that the first cryptographic key is inaccessible which causes the first replication instance to be unavailable. In response to determining that the first cryptographic key is inaccessible, the method includes scheduling a second replication instance to be unavailable after a threshold amount of time has passed. The second replication instance includes replicated data encrypted by a second cryptographic key that is accessible. After the threshold amount of time has passed and when the first cryptographic key is still inaccessible, the method includes setting the second replication instance as unavailable.

Abstract: A method includes obtaining a key status for a first cryptographic key. The first cryptographic key is used to encrypt replicated data of a first replication instance. The method also includes determining, based on the key status, that the first cryptographic key is inaccessible which causes the first replication instance to be unavailable. In response to determining that the first cryptographic key is inaccessible, the method includes scheduling a second replication instance to be unavailable after a threshold amount of time has passed. The second replication instance includes replicated data encrypted by a second cryptographic key that is accessible. After the threshold amount of time has passed and when the first cryptographic key is still inaccessible, the method includes setting the second replication instance as unavailable.

Abstract: A negative electrode material on which a metal element is gradient-doped and an application thereof. The negative electrode material comprises a granular silica/M composite material on which a metal element M is gradient-doped. The general formula of the silica is SiOx, wherein 0<x<2. The metal element M comprises one or more among Na, Mg, Al, Li, Mn, Fe, Co, Ni, Cu, or Zn. In the negative electrode material, the content of the metal element M gradually decreases from the surface to the core, presenting a doping distribution having a continuous concentration gradient. The general chemical formula of the silica/M composite material is SiMyOz, wherein 0<y<10 and 0<z<10.

Abstract: A silicon-based negative electrode material containing a silicate skeleton, a negative electrode plate and a lithium battery. The silicon-based negative electrode material comprises a modified silicon monoxide material having a dispersedly distributed silicate material inside same. The general formula of the modified silicon monoxide material is MxSiOy, with 1<x<6, 3<y<6, element M comprising one or more of Mg, Ni, Cu, Zn, Al, Na, Ca, K, Li, Fe and Co, and the grain size being 0.5-100 nm. In the modified silicon monoxide material, the content of the silicate material is 5-60% of the total mass of the modified silicon monoxide material. The dispersedly distributed silicate material forms a skeleton structure of the silicon-based negative electrode material, does not undergo a physicochemical reaction along with the lithium removal and lithium intercalation of the silicon-based negative electrode material in the cycle process, and maintains the original structure thereof after multiple cycles.

Abstract: A method includes obtaining a key status for a first cryptographic key. The first cryptographic key is used to encrypt replicated data of a first replication instance. The method also includes determining, based on the key status, that the first cryptographic key is inaccessible which causes the first replication instance to be unavailable. In response to determining that the first cryptographic key is inaccessible, the method includes scheduling a second replication instance to be unavailable after a threshold amount of time has passed. The second replication instance includes replicated data encrypted by a second cryptographic key that is accessible. After the threshold amount of time has passed and when the first cryptographic key is still inaccessible, the method includes setting the second replication instance as unavailable.

Abstract: The invention relates to a silicon-based anode material for a lithium-ion battery, a preparation method therefor, and a battery. The silicon-based negative electrode material is prepared by the compounding of 90 wt %-99.9 wt % of a silicon-based material and 0.1 wt %-10 wt % of carbon nanotubes and/or carbon nanofibers which grow on the surface of the silicon-based material in situ.